John oem



@uitrit Y glatte datent @frn y JOHN ORM, 0F PKADUGA'H, KENTUCKY.

Letters Patent Noi 81,673, @lated September 1, 1868.-

l IMPROVEMENT IN CIRCULAR-SAW MILLS.

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Be it known that I, JOHN ORM, of laducah, in the county of MCraeken, and State of Kentucky, have invented a new and useful Improvement in Circular-Saw Carriages; and I do hereby declare that the following is a i`ui'1lv,tclear, and exact description thereof, which will 4enable others skilled in the art to make and use the same, reference being had tothe accompanyingdrawings, forming part of this specification.

- Figure l1 is a vertical longitudinal section of the carriage-way and carriage of 'a circular-saw mill illustrating my improvements. f

Figure 2 is a top view of the same. I 4

Siniilar letters 'of reference indicate corresponding parts. V

My invention has for its' object to improve the construction of the carriages of circular-saw mills, so as to" make them more convenient and e'ective in operation; and'it consists in the manner in which the Vcars or trucks offthe carriage are coupled to, Ieach other, and inthe manner in which the a'xles of the said trucks are combined with thetruck-frames, as hereinafter more fully described.

A is the sawframe,.B is the shaft, and C is the saw, all of` which parts are constructed and arranged in 'the usual manner. j

D are the truck-frames, two or more of which are used, and towhieh the head-block E is attached in the ordinary manner. F is the toothed rack, by which motion is comlnunicated to the carriage, and to which the car or truck-frames D areattached. l I

One ofthetruck-frames D is securely and permanently bolted or otherwise attached to the said rack F.v The other truek-frame or frames are adjustably secured to the said toothed rack F, so that the length of the carriage may be adjusted according to the length of thelogs to be sewn.

Gr is the coupling, by which the adjustable truckframe or frauics are secured to the toothed rack F. The. coupling Gis securely attached to the truckframe, and is formed with downwardlyfprojecting ears, through which and through the said toothed rack F, passes a bolt, so that the said frame may be readily detached and adjusted as required, according to the length of the log to be sewn.

The truck-frames D are mounted upon wheels H, `which roll along therails I of the carriage-way J. The wheels H ot'-A the carriage areiianged, and are so arranged upon their axles, that the distance between the outer sides of the flanges of each pair of wheels may be three-eighths of an inch, more or less, than the distance between the inner sides of the rails, so that the sai/drtrucks may bave a slight lateral movement.

K are the axles of the wheels H, and whiehure secured tothe truck-frames D, in a slightly-inclined position, as shown in iig. 2, the ends of said axles that are towards the saw C, being set a little ,in the rear of their other or outer ends. Y I

By this construction, as the carriage isfed forward towards the saw, the flanges of the wheels will be pressed against the side of the inner rail of the carriage-way, and whenV 'the carriage is running back, the iian'ges of the outer wheels will be pressed against the side of the outer raihinoving the log laterally from the saw, and preventing the log frombeing scarred by the saw while thercarriage is being run back.

I claim las new, and desire to secure by Letters Patent- Adjustably connecting one or more of the truck-frames Dto the toothedraok F, by means of the coupling G, as herein shown and described and for the purpose set forth.

JOHN ORM.

Witnesses:

GEO. LANGSTAFF, WILSON Thomson. 

